web/.htaccess: mod_autoindex: sort by description when provided, to allow setting a custom (non-alphabetical) sort order using AddDescription

web/.htaccess: mod_autoindex: added note that some listed files are not web-accessible. they will produce a "Forbidden" error when clicked.

bugfix: web/index.php: added space between the full directory index and the preceding content

web/index.php: moved the full directory index within the rest of the document body

web/index.php: include full directory index, since the URL patterns list is just a subset of the content available through vegpath.org

web/.htaccess: added mod_autoindex IndexOptions, in particular FoldersFirst

bugfix: web/.htaccess: changed "mod_dir listing"->"mod_autoindex listing" because mod_dir does not actually handle the autogenerated listings

bugfix: web/.htaccess: DirectoryIndex: use disabled instead of on because on is actually treated as a filename, and does not invoke mod_autoindex. the DirectoryIndex directive and the mod_dir module actually apply only to manual index files, not to autogenerated dir listings (which are handled by mod_autoindex).

web/index.php: removed no longer needed custom alias j.mp/vegpath# for when page reached through vegbiendev.nceas.ucsb.edu, because vegpath.org is a much more reliable domain than the previous path.vg, and a separate way to reach VegPath when path.vg is down is no longer needed

web/.htaccess: <dir>/all forces mod_dir listing: use simpler $mod_dir_listing env var instead of query string modification to indicate that an explicit mod_dir listing should be displayed. this causes /all to replace ?index=1 as the way to force a mod_dir listing. note that the %{ENV:...} test needs to use $REDIRECT_mod_dir_listing instead of $mod_dir_listing, because a redirect will occur between the /all rule and the index.* rule, causing all env vars to be prepended with REDIRECT_ .